American Deer
CR

American Deer

Odocoileus virginianus

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/White-tailed_deer

Overview

The white-tailed deer, also known commonly as the whitetail and the Virginia deer, is a medium-sized species of deer native to North and South America. It is the most widely distributed mainland ungulate herbivore in the Americas; coupled with its natural predator, the mountain lion, it is one of the most widely distributed terrestrial mammal species in the Americas and the world. Highly adaptable, the various subspecies of white-tailed deer inhabit many different ecosystems, from arid grasslands to the Amazon and Orinoco basins; from the Llanos to the high-elevation terrain of the Andes.

White-tailed Deer face severe population declines in certain regions due to habitat fragmentation from urban development and agricultural expansion, which isolates populations and reduces genetic diversity. Vehicle strikes on roads fragmenting their habitat cause significant mortality, while climate change alters vegetation patterns and increases disease transmission rates. Conservation status may vary by region or assessment authority, with some local populations experiencing critical declines despite broader species distribution.

Threat summary

Habitat

Deciduous and mixed forests, woodland edges, agricultural areas, grasslands, and shrublands from sea level to mountainous regions up to 3000m elevation. They utilize forest understory for cover and adjacent open areas including meadows, crop fields, and suburban landscapes for foraging.

TERRESTRIAL· majorTERRESTRIAL· majorTERRESTRIAL· major

Other threatened species in Cervidae

Barbary Red Deer (barbarus)VU

Barbary Red Deer (barbarus)

Cervus elaphus

Unknown
Northern PuduVU

Northern Pudu

Pudu mephistophiles

Unknown

Frequently asked questions

Why is American Deer classified as Critically Endangered?
American Deer is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. White-tailed Deer face severe population declines in certain regions due to habitat fragmentation from urban development and agricultural expansion, which isolates populations and reduces genetic diversity. Vehicle strikes on roads fragmenting their habitat cause significant mortality, while climate change alters vegetation patterns and increases disease transmission rates. Conservation status may vary by region or assessment authority, with some local populations experiencing critical declines despite broader species distribution.
Where does American Deer live?
American Deer occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to American Deer?
The main threats to American Deer are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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